Electric pump

Abstract

An electric pump is disclosed. The electric pump includes a first cavity. When the electric pump operates, there is an operating medium in the first cavity. The electric pump includes a control unit and a rotating unit. The control unit is located in the first cavity, and at least a part of the rotating unit is located in the first cavity. The control unit includes a circuit board, a magnetic element, and a sensor. The circuit board is electrically connected and / or signal-connected to the sensor. An end of the rotating unit that is relatively close to the circuit board is fixedly connected to the magnetic element or connected in a position-limited manner. The circuit board includes a first surface facing the magnetic element, and at least a part of the sensor is located on the first surface. The magnetic element is located within the detection range of the sensor, and at least a part of the projection of the magnetic element on the first surface overlaps the sensor, or the sensor is located within the projection range of the magnetic element on the first surface. This application can detect the rotation status of the electric pump well.

Claims

1. An electric pump comprising a first cavity (20) and a working medium in the first cavity (20) when the electric pump is operating, the electric pump includes a control unit (4) and a rotating unit, the control unit (4) located in the first cavity (20), at least a portion of the rotating unit located in the first cavity (20), the control unit (4) including a circuit board (41), a magnetic element (33) and a sensor (42), the circuit board (41) in contact with the working medium, the circuit board (41) being electrically and / or signal-connected to the sensor (42), and the rotating unit An electric pump characterized in that the end of the sensor (42) that is relatively close to the circuit board (41) is fixedly connected to or positioned to the magnetic element (33), the circuit board (41) includes a first surface (411) facing the magnetic element (33), at least a portion of the sensor (42) is located on the first surface (411), the magnetic element (33) is located within the detection range of the sensor (42), at least a portion of the projection of the magnetic element (33) on the first surface (411) is superimposed on the sensor (42), or the sensor (42) is located within the projection range of the magnetic element (33) on the first surface (411).

2. The electric pump according to claim 1, characterized in that the rotating unit includes a first end (61), the magnetic element (33) is fixedly connected to the first end (61) or connected in such a way that its position is restricted, the electric pump comprises a first passage (40), the first passage (40) comprises a first opening (401) in the side wall of the first end (61), and the first passage (40) communicates with the first cavity (20).

3. The electric pump according to claim 1, characterized in that the rotating unit includes a rotating shaft (6), the rotating shaft (6) includes a first end (61), the first end (61) includes a first end face (611) and a first side surface (612), the electric pump comprises a first passage (40), the first passage (40) comprises a first opening (401), a portion of the first opening (401) is located on the first end face (611), and another portion of the first opening (401) is located on the first side surface (612), the magnetic element (33) is fixedly connected to the first end face (611) or connected in such a way that its position is restricted, and the first opening (401) communicates with the first cavity (20).

4. The electric pump according to claim 2, characterized in that the rotating unit includes a rotating shaft (6), the rotating shaft (6) includes a first end (61), the first end (61) includes a first end face (611) and a first side surface (612), the magnetic element (33) is fixedly connected to the first end face (611) or connected to such a position as to be restricted, the first passage (40) has at least two first openings (401) on the first side surface (612), the first openings (401) are arranged along the radial direction of the rotating shaft (6) or along the axial direction of the rotating shaft (6), and the first openings (401) communicate with the first cavity (20).

5. The electric pump according to any one of claims 2 to 4, wherein the rotating unit includes a rotating shaft (6) and an anti-magnetic portion (9), and the magnetic element (33) is located on one side of the anti-magnetic portion (9) along the axial direction of the electric pump, the rotating shaft (6) is located on the other side of the anti-magnetic portion (9), and the magnetic element (33) is fixed to the side wall of the anti-magnetic portion (9) or is constructed integrally with the anti-magnetic portion (9).

6. The electric pump according to any one of claims 2 to 4, characterized in that the rotating unit includes a rotating shaft (6) and a connecting portion (8), the connecting portion (8) includes a housing hole (81), at least a portion of the rotating shaft (6) is located within the housing hole (81), the side wall forming the housing hole (81) is fixedly connected to or positioned to the outer wall of at least a portion of the rotating shaft (6), the magnetic element (33) is fixedly connected to or positioned to the outer wall of the connecting portion (8), the connecting portion (8) includes a first through hole (82), and the first through hole (82) communicates with the first opening (401) and the first cavity (20).

7. The electric pump according to any one of claims 2 to 4, characterized in that the first end (61) includes a first end face (611), the magnetic element (33) is fixedly connected to the first end face (611) or connected in such a way that its position is restricted, and includes a second through hole (333), the second through hole (333) communicating with the first passage (40) and the first cavity (20).

8. The electric pump according to claim 5, characterized in that the first end (61) includes a first end face (611), the magnetic element (33) is fixedly connected to the first end face (611) or connected in such a way that its position is restricted, and includes a second through hole (333), the second through hole (333) communicating with the first passage (40) and the first cavity (20).

9. The electric pump includes a first rotor unit (21) and a second rotor unit (31), the electric pump comprises a second cavity (30) and a first passage (40), the first rotor unit (21) is located in the second cavity (30), the rotating unit includes a rotating shaft (6), the second rotor unit (31) is located in the first cavity (20) and connected to the rotating shaft (6) to transmit power, the rotating shaft (6) includes a first end (61') and a second end (62'), and along the axial direction of the rotating shaft (6), the first end (61') is greater than the second end (62') The electric pump according to claim 1, wherein the ') is separated from the circuit board (41), the first passage (40) comprises a first opening (401') and a second opening (402'), the first opening (401') is located at the first end (61'), the second opening (402') communicates with the first cavity (20), the second end (62') is located in the first cavity (20), the first end (61') is connected to transmit to the first rotor unit (21), and the magnetic element (33) is fixedly connected to the second end (62') or connected to be position-restricted.

10. The electric pump according to claim 9, characterized in that the second end (62') is provided with a first housing hole (63), at least a portion of the magnetic element (33) is located in the first housing hole (63), the side wall forming the first housing hole (63) is fixedly connected to the outer circumference of the magnetic element (33) or connected in such a way that its position is restricted, and the second opening (402') of the first passage (40) is located in the outer wall of the second end (62').

11. The electric pump according to claim 9, characterized in that the magnetic element (33) comprises a second housing hole (334), at least a portion of the second end (62') is located in the second housing hole (334), the outer circumference of the second end (62') is fixedly connected to or positioned to the side wall forming the second housing hole (334), the second end (62') includes a first end face (611), and the first passage (40) comprises the second opening (402') at the first end face (611).

12. The electric pump according to claim 9, characterized in that the second end (62') includes a first end face (611), the magnetic element (33) is fixedly connected to or positioned to the first end face (611), the magnetic element (33) has a through hole (335), the through hole (335) communicates with the first opening (401') and the first cavity (20).

13. The electric pump according to any one of claims 9 to 12, wherein the electric pump includes a magnetization prevention section (9), the magnetic element (33) is located on one side of the magnetization prevention section (9) along the radial direction of the rotating shaft (6), the rotating shaft (6) is located on the other side of the magnetization prevention section (9), and the magnetization prevention section (9) is fixed to the inner wall of the magnetic element (33) or is constructed integrally with the magnetic element (33).

14. The electric pump according to claim 2, wherein the magnetic element (33) includes an upper magnetic surface (331) and a lower magnetic surface (332), and along the axial direction of the rotation axis (6), the upper magnetic surface (331) is separated from the circuit board (41) relative to the lower magnetic surface (332), and the axial distance between the lower magnetic surface (332) and the sensor (42) is 2 cm or less.

15. The electric pump according to claim 2 or 14, characterized in that the electric pump includes a bottom wall (301), the electric pump has a second cavity (30), the second cavity (30) is located on one side of the bottom wall (301) in the axial direction of the electric pump, the first cavity is located on the other side of the bottom wall (301), the electric pump includes a second passage (50), the second passage (50) penetrates the upper and lower surfaces of the bottom wall (301) and connects the first cavity (20) and the second cavity (30).

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